A standardized classification system based on evolutionary trends and relationships was established to group living things. Which of these justifies the use of a standardized classification system?

At the beginning of the Paleozoic era, animals underwent an adaptive radiation event, called the Cambrian explosion. During this relatively short span of geological time, the ancestors of most animal phyla arose. Classification of taxa at the rank of phylum is based largely on body plan, which is laid out during embryonic development. Answer the questions that follow:   What environmental condition may have contributed to the Cambrian explosion?     What is one evolutionary novelty (phenotypic trait) that also contributed to the Cambrian explosion?     Genetic and developmental mechanisms also contributed to the Cambrian explosion. Before the Cambrian, animals were small with simple body plans (g., sponges and jellyfish). By the end of the period, larger animals with complex body forms had evolved (e.g., arthropods and vertebrates). Did the following genetic mechanisms impact the evolution of body plan complexity? Provide a brief explanation for each answer.     gene duplication…

Whales and sharks both have dorsal fins which keep them stable while swimming through the water. This feature is very similar in both groups, despite them being only distantly related. The feature evolved independently in both groups. This is an example of a/an:     Analagous structure     Parallel evolution     Homologous structure     Preadaptation

Should more weight should be given to genetic data or to information derived from comparative anatomy (phenotypes) in regard to taxonomic classification?